EP2745082B1 - System for determining and/or monitoring at least one process variable - Google Patents

System for determining and/or monitoring at least one process variable Download PDF

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Publication number
EP2745082B1
EP2745082B1 EP12743932.1A EP12743932A EP2745082B1 EP 2745082 B1 EP2745082 B1 EP 2745082B1 EP 12743932 A EP12743932 A EP 12743932A EP 2745082 B1 EP2745082 B1 EP 2745082B1
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EP
European Patent Office
Prior art keywords
electronic module
unit
sensor unit
adapter
electronic
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German (de)
French (fr)
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EP2745082A2 (en
Inventor
Ira Henkel
Alexander Müller
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Endress and Hauser SE and Co KG
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Endress and Hauser SE and Co KG
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments

Definitions

  • the present invention relates to a system for determining and / or monitoring at least one process variable of a medium in a container or a pipeline.
  • the system includes at least one sensor unit sensitive to the process variable.
  • the process variable is, for example, the level, the density, the viscosity, or the conductivity of a medium.
  • a large number of measuring devices with different sensor units for determining or monitoring one or more process variables are known.
  • Such devices usually have a sensor housing with a process connection, which is introduced into the wall of a container or a pipe.
  • the sensor housing In the sensor housing are the measuring electronics and depending on the design, at least partially the sensor unit.
  • another housing Connected to the sensor housing is another housing, which remains outside the process, houses the electronics unit and serves as a protective housing.
  • the electronics unit is incorporated in the form of a module with its own housing in the protective housing.
  • Further elements of the protective housing are, for example, a display for displaying measured values or user information and an interface to a bus system, via which, for example, data can be exchanged between the measuring device and a control room or the meter can also be supplied with energy.
  • Embodiments are known in which the electronics unit is arranged at a distance from the sensor unit, for example by mounting on an adjacent or more distant building wall.
  • a protective housing is required in hazardous areas to meet safety standards. This requires two protective housings, one for the cable feed of the sensor unit and one for the electronics unit. This makes such a configuration of a measuring device expensive. Furthermore, the mounting of the electronic unit-containing protective housing is relatively expensive.
  • the object of the invention is to provide a device for determining and / or monitoring at least one process variable with an electronics unit arranged at a distance from the sensor unit, which is less expensive than the solution known from the prior art.
  • a system for determining and / or monitoring at least one process variable of a medium in a container or a pipeline having a sensor unit which has a sensor element for detecting the process variable, with an electronics module having an electronic unit in the form of an insert for a Field housing, and with an adapter which is designed such that the electronic module is remote from the sensor unit and without field housing on a mounting rail can be arranged.
  • the electronic module is installed in a control room remote from the measuring point and connected to the sensor unit, for example via a correspondingly long electrical line.
  • the electronic module does not require a protective housing, since it is arranged on a mounting rail, for example a DIN rail, in a control cabinet of the control room.
  • a mounting rail for example a DIN rail
  • Due to the saved field housing for the electronic module the system is inexpensive.
  • the arrangement saves space on the mounting rail. Another advantage is the easy installation and interchangeability of the electronic module.
  • the adapter is designed such that the adapter can be pushed onto the mounting rail or clamped to the mounting rail.
  • the electronic module with the adapter can be screwed. As a result, a stable and yet easy to be solved if necessary connection between electronic module and adapter can be produced.
  • the adapter has a printed circuit board with at least one connection contact, wherein the electronic module in such a way with the Circuit board is connectable, that at least one output signal of the electronic unit can be tapped off at the at least one terminal contact.
  • the sensor unit and the electronic module are connected to one another via at least one electrical line.
  • the electrical line is used for the transmission of energy to the sensor unit and the preferably bidirectional data transmission between the sensor unit and the electronic unit.
  • An embodiment provides that the electronic unit is configured such that it supplies the sensor unit with a control signal, receives from the sensor unit a received signal representing the process variable and evaluates the received signal with respect to the process variable.
  • the electronic unit generates at least one switching signal which serves to control a downstream field device.
  • the switching signal is used to control a downstream pump or a valve.
  • the sensor element is a mechanically oscillatable unit or a capacitive and / or conductive probe.
  • the mechanically oscillatable unit is in particular a tuning fork or a vibrating rod, the latter being used primarily in bulk solids.
  • Vibronic measuring instruments, in which a tuning fork forms the sensor element, are known from the prior art and are offered and distributed by the applicant in a great variety under the name Liquiphant for liquids and Soliphant for bulk materials. In principle, however, the invention is applicable to any sensor units which are to be connected to an electronic unit.
  • the process variable is at least one of the variables fill level, density, viscosity and electrical conductivity. However, it can also be other process variables of gases, liquids or solids.
  • Fig. 1 shows a measuring point and a spaced therefrom control room, which is shown here schematically by a cabinet 6 behind a partition 9.
  • the sensor unit 1 is arranged such that the sensitive to be determined process variable sensor element 11, here schematically represented as tines of a tuning fork, projects into the container 8.
  • the sensor housing 12 of the sensor unit 1 has for this purpose a process connection.
  • a sensor electronics unit is further arranged.
  • the sensor housing 12 has a passage for the electrical line 5.
  • the sensor unit 1 can be supplied with energy and data can be transmitted to and from the sensor unit 1.
  • the energy and data transmission to the sensor unit 1 is controlled by the electronic module 2. This is connected via the electrical line 5 to the sensor unit 1, but arranged offset from the sensor unit 1, so that one can speak of a remote version.
  • the electronic module 2 is located in the control room on a mounting rail 7.
  • a control cabinet 6 is set up in a control room, which several mounting rails 7 for attaching electronic devices such For example, has control units or switching elements.
  • Such an arrangement is particularly space-saving. Since a mounting rail 7 is usually present, the attachment of the electronic module 2 according to the invention utilizes existing infrastructure. There is no additional space required for wall mounting a field housing with electronics module.
  • the arrangement of the electronic module 2 in the control cabinet 6 is particularly advantageous when using the meter in hazardous areas, since only the sensor unit 1 is located in the vulnerable area, but not the electronic unit. Since the electronic module 2 is disposed within the control room and thus in any case outside a hazardous area, a protective housing for the electronic module 2 is not required.
  • the electronic module 2 consists essentially of an electronic unit, which is to be understood as arranged on one or more printed circuit boards electronic components such as microcontroller, A / D and D / A converters, resistors, capacitors, etc., and an electronics housing.
  • the electronics housing combines the individual components of the electronics unit and protects them from dust or moisture.
  • the electronics unit may be cast in the electronics housing.
  • the electronics housing has one or more interfaces, via which an electrical signal can be tapped off and forwarded.
  • the sensor unit 1 is supplied with power via the electronic module 2.
  • Fig. 2 the attachment of the electronic module 2 to the mounting rail 7 is illustrated.
  • the mounting rail 7 is, for example, a so-called DIN rail, which is also known as DIN rail TS-35.
  • the adapter 3 can also be adapted to another support rail 7, such as a G-rail.
  • the mounting of the electronic module 2 to the mounting rail 7 is possible in a simple manner.
  • the electronic module 2 by means of screws to the adapter 3 can be attached and the adapter 3 pushed onto the rail or clamped.
  • the disassembly and replacement of the electronic module 2 are correspondingly fast and feasible without great effort.
  • these are Electronics module 2 and the adapter designed in one piece, ie the adapter is part of the housing of the electronic module. 2
  • the adapter 3 has a printed circuit board 31, which is configured, for example, inserted. On the printed circuit board 31 are printed conductors, which on the one hand lead into terminal contacts 32 and on the other hand are contacted by the electronic module 2. Via the connection contacts 32, the connection of the electronic module 2 to a power source and the output of one or more output signals of the electronic module 2 take place.
  • the electronic unit of the electronic module 2 is advantageously designed such that no additional control unit for downstream field devices is required.
  • the electronic unit in addition to means for evaluating the received signal transmitted by the sensor unit 1, the electronic unit has means for generating at least one switching signal which can be relayed to and processed by the field devices which have been readjusted. Another signal can be transmitted to a computer, which is connected via a bus system to the electronic module 2 and via which, for example, the input of parameters for the measurement is possible. Further functions of the electronic module 2 are, for example, the generation of a signal suitable for energy and data transmission to the sensor unit 1.
  • the communication between sensor unit 1 and electronic module 2 preferably takes place via a UART interface.
  • the switching signal is output via the connection contacts 32, which signals the reaching of the level to be monitored. This is forwarded, for example as a control signal to a pump.
  • the electronics unit of the electronic module 2 is designed such that it evaluates the received signal from the sensor unit 1, but for the generation of the appropriate switching signal for downstream field devices, as well as for communication with a computer, a separate control unit is responsible.
  • the electronic module 2 transmits an output signal, preferably a 4-20mA signal, to the control unit.
  • the communication between the sensor unit 1 and the electronic module 2 preferably takes place via a method which allows a relatively long length of the electrical line 5, which connects the sensor unit 1 to the electronic module 2, so that the invention is not only located in the immediate vicinity of a control cabinet 6 Sensor units 1 is applicable.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Description

Die vorliegende Erfindung betrifft ein System zur Bestimmung und/oder Überwachung mindestens einer Prozessgröße eines Mediums in einem Behälter oder einer Rohrleitung. Das System beinhaltet mindestens eine für die Prozessgröße sensitive Sensoreinheit. Bei der Prozessgröße handelt es sich beispielsweise um den Füllstand, die Dichte, die Viskosität, oder die Leitfähigkeit eines Mediums.The present invention relates to a system for determining and / or monitoring at least one process variable of a medium in a container or a pipeline. The system includes at least one sensor unit sensitive to the process variable. The process variable is, for example, the level, the density, the viscosity, or the conductivity of a medium.

Aus der Prozessmesstechnik ist eine Vielzahl an Messgeräten mit unterschiedlichen Sensoreinheiten zur Bestimmung oder Überwachung einer oder mehrerer Prozessgrößen bekannt. Derartige Vorrichtungen besitzen meist ein Sensorgehäuse mit einem Prozessanschluss, welcher in die Wandung eines Behälters oder einer Rohrleitung eingebracht wird. In dem Sensorgehäuse befinden sich die Messelektronik und je nach Ausgestaltung zumindest teilweise die Sensoreinheit. Mit dem Sensorgehäuse verbunden ist ein weiteres Gehäuse, welches außerhalb des Prozesses verbleibt, die Elektronikeinheit beherbergt und als Schutzgehäuse dient. Häufig ist die Elektronikeinheit in Form eines Moduls mit eigenem Gehäuse in das Schutzgehäuse eingebracht. Weitere Elemente des Schutzgehäuses sind beispielsweise ein Display zur Anzeige von Messwerten oder Benutzerinformationen und eine Schnittstellen zu einem Bussystem, über welches beispielsweise Daten zwischen dem Messgerät und einer Leitwarte austauschbar sind oder auch das Messgerät mit Energie versorgbar ist.From process measurement technology, a large number of measuring devices with different sensor units for determining or monitoring one or more process variables are known. Such devices usually have a sensor housing with a process connection, which is introduced into the wall of a container or a pipe. In the sensor housing are the measuring electronics and depending on the design, at least partially the sensor unit. Connected to the sensor housing is another housing, which remains outside the process, houses the electronics unit and serves as a protective housing. Often the electronics unit is incorporated in the form of a module with its own housing in the protective housing. Further elements of the protective housing are, for example, a display for displaying measured values or user information and an interface to a bus system, via which, for example, data can be exchanged between the measuring device and a control room or the meter can also be supplied with energy.

Es sind Ausgestaltungen bekannt, bei welchen die Elektronikeinheit von der Sensoreinheit beabstandet angeordnet ist, beispielsweise durch Montage an einer benachbarten oder weiter entfernten Gebäudewand. Für elektronische Bauteile ist in explosionsgefährdeten Bereichen ein Schutzgehäuse erforderlich, um den Sicherheitsstandards zu genügen. Hierdurch sind zwei Schutzgehäuse erforderlich, eines für die Kabelzuführung der Sensoreinheit und eines für die Elektronikeinheit. Dies macht eine derartige Ausgestaltung eines Messgerätes kostenintensiv. Weiterhin ist die Montage des die Elektronikeinheit beinhaltenden Schutzgehäuses relativ aufwendig.Embodiments are known in which the electronics unit is arranged at a distance from the sensor unit, for example by mounting on an adjacent or more distant building wall. For electronic components, a protective housing is required in hazardous areas to meet safety standards. This requires two protective housings, one for the cable feed of the sensor unit and one for the electronics unit. This makes such a configuration of a measuring device expensive. Furthermore, the mounting of the electronic unit-containing protective housing is relatively expensive.

Die Aufgabe der Erfindung besteht darin, eine Vorrichtung zur Bestimmung und/oder Überwachung mindestens einer Prozessgröße mit einer von der Sensoreinheit beabstandet angeordneten Elektronikeinheit bereit zu stellen, welche gegenüber der aus dem Stand der Technik bekannten Lösung kostengünstiger ist.The object of the invention is to provide a device for determining and / or monitoring at least one process variable with an electronics unit arranged at a distance from the sensor unit, which is less expensive than the solution known from the prior art.

Die Aufgabe wird gelöst durch ein System zur Bestimmung und/oder Überwachung mindestens einer Prozessgröße eines Mediums in einem Behälter oder einer Rohrleitung, mit einer Sensoreinheit, welche ein Sensorelement zur Erfassung der Prozessgröße aufweist, mit einem eine Elektronikeinheit aufweisenden Elektronikmodul in Form eines Einsatzes für ein Feldgehäuse, und mit einem Adapter, welcher derart ausgestaltet ist, dass das Elektronikmodul abgesetzt von der Sensoreinheit und ohne Feldgehäuse auf einer Tragschiene anordenbar ist.The object is achieved by a system for determining and / or monitoring at least one process variable of a medium in a container or a pipeline, having a sensor unit which has a sensor element for detecting the process variable, with an electronics module having an electronic unit in the form of an insert for a Field housing, and with an adapter which is designed such that the electronic module is remote from the sensor unit and without field housing on a mounting rail can be arranged.

Erfindungsgemäß wird das Elektronikmodul in einer von der Messstelle entfernten Leitwarte installiert und mit der Sensoreinheit beispielsweise über eine entsprechend lange elektrische Leitung verbunden. Das Elektronikmodul benötigt kein Schutzgehäuse, da es auf einer Tragschiene, beispielsweise einer Hutschiene, in einem Schaltschrank der Leitwarte angeordnet ist. Dort herrscht auf jeden Fall keine Explosionsgefahr, sodass keine Sicherheitsbestimmungen in Form von vorgeschriebenen Gehäusen für elektrische Bauteile bestehen. Durch das eingesparte Feldgehäuse für das Elektronikmodul ist das System kostengünstig. Zudem spart die Anordnung auf der Tragschiene Platz. Ein weiterer Vorteil besteht in der problemlosen Montage und Austauschbarkeit des Elektronikmoduls.According to the invention, the electronic module is installed in a control room remote from the measuring point and connected to the sensor unit, for example via a correspondingly long electrical line. The electronic module does not require a protective housing, since it is arranged on a mounting rail, for example a DIN rail, in a control cabinet of the control room. In any case, there is no risk of explosion, so there are no safety regulations in the form of prescribed housings for electrical components. Due to the saved field housing for the electronic module, the system is inexpensive. In addition, the arrangement saves space on the mounting rail. Another advantage is the easy installation and interchangeability of the electronic module.

In einer ersten Ausgestaltung der erfindungsgemäßen Lösung ist der Adapter derart ausgestaltet, dass der Adapter auf die Tragschiene aufschiebbar oder an der Tragschiene festklemmbar ist.In a first embodiment of the solution according to the invention, the adapter is designed such that the adapter can be pushed onto the mounting rail or clamped to the mounting rail.

In einer Ausgestaltung ist das Elektronikmodul mit dem Adapter verschraubbar. Hierdurch ist eine stabile und dennoch bei Bedarf einfach zu lösende Verbindung zwischen Elektronikmodul und Adapter herstellbar.In one embodiment, the electronic module with the adapter can be screwed. As a result, a stable and yet easy to be solved if necessary connection between electronic module and adapter can be produced.

Gemäß einer Ausgestaltung verfügt der Adapter über eine Leiterplatte mit mindestens einem Anschlusskontakt, wobei das Elektronikmodul derart mit der Leiterplatte verbindbar ist, dass mindestens ein Ausgangssignal der Elektronikeinheit an dem mindestens einen Anschlusskontakt abgreifbar ist.According to one embodiment, the adapter has a printed circuit board with at least one connection contact, wherein the electronic module in such a way with the Circuit board is connectable, that at least one output signal of the electronic unit can be tapped off at the at least one terminal contact.

In einer weiteren Ausgestaltung sind die Sensoreinheit und das Elektronikmodul über mindestens eine Elektrische Leitung miteinander verbunden. Die Elektrische Leitung dient der Übertragung von Energie an die Sensoreinheit und der vorzugsweise bidirektionalen Datenübertragung zwischen Sensoreinheit und Elektronikeinheit.In a further embodiment, the sensor unit and the electronic module are connected to one another via at least one electrical line. The electrical line is used for the transmission of energy to the sensor unit and the preferably bidirectional data transmission between the sensor unit and the electronic unit.

Eine Ausgestaltung sieht vor, dass die Elektronikeinheit derart ausgestaltet ist, dass sie die Sensoreinheit mit einem Steuersignal versorgt, von der Sensoreinheit ein die Prozessgröße repräsentierendes Empfangssignal empfängt und das Empfangssignal in Bezug auf die Prozessgröße auswertet.An embodiment provides that the electronic unit is configured such that it supplies the sensor unit with a control signal, receives from the sensor unit a received signal representing the process variable and evaluates the received signal with respect to the process variable.

Gemäß einer weiteren Ausgestaltung erzeugt die Elektronikeinheit mindestens ein Schaltsignal, welches der Steuerung eines nachgeordneten Feldgerätes dient. Beispielsweise dient das Schaltsignal der Steuerung einer nachgeordneten Pumpe oder eines Ventils.According to a further embodiment, the electronic unit generates at least one switching signal which serves to control a downstream field device. For example, the switching signal is used to control a downstream pump or a valve.

In einer weiteren Ausgestaltung handelt es sich bei dem Sensorelement um eine mechanisch schwingfähige Einheit oder um eine kapazitive und/oder konduktive Sonde. Die mechanisch schwingfähige Einheit ist insbesondere eine Schwinggabel oder ein Schwingstab, wobei letzterer vor allem in Schüttgütern zum Einsatz kommt. Vibronische Messgeräte, bei welchen eine Schwinggabel das Sensorelement bildet, sind aus dem Stand der Technik bekannt und werden von der Anmelderin in großer Vielfalt unter dem Namen Liquiphant für Flüssigkeiten und Soliphant für Schüttgüter angeboten und vertrieben. Prinzipiell ist die Erfindung jedoch auf beliebige Sensoreinheiten anwendbar, welche mit einer Elektronikeinheit zu verbinden sind.In a further embodiment, the sensor element is a mechanically oscillatable unit or a capacitive and / or conductive probe. The mechanically oscillatable unit is in particular a tuning fork or a vibrating rod, the latter being used primarily in bulk solids. Vibronic measuring instruments, in which a tuning fork forms the sensor element, are known from the prior art and are offered and distributed by the applicant in a great variety under the name Liquiphant for liquids and Soliphant for bulk materials. In principle, however, the invention is applicable to any sensor units which are to be connected to an electronic unit.

In einer Ausgestaltung handelt es sich bei der Prozessgröße um mindestens eine der Größen Füllstand, Dichte, Viskosität und elektrische Leitfähigkeit. Es kann sich jedoch auch andere Prozessgrößen von Gasen, Flüssigkeiten oder Feststoffen handeln.In one embodiment, the process variable is at least one of the variables fill level, density, viscosity and electrical conductivity. However, it can also be other process variables of gases, liquids or solids.

Die Erfindung wird anhand der nachfolgenden Figuren näher erläutert.

  • Fig. 1 skizziert eine Remote-Ausführung eines Messgerätes;
  • Fig. 2 zeigt ein mittels Adapter auf einer Tragschiene befestigtes Elektronikmodul.
The invention will be explained in more detail with reference to the following figures.
  • Fig. 1 outlines a remote version of a measuring device;
  • Fig. 2 shows an attached by means of adapter on a mounting rail electronic module.

Fig. 1 zeigt eine Messstelle und einen davon beabstandeten Kontrollraum, welcher hier schematisch durch einen Schaltschrank 6 hinter einer Trennwand 9 dargestellt ist. An der Messstelle ist die Sensoreinheit 1 derart angeordnet, dass das für die zu bestimmende Prozessgröße sensitive Sensorelement 11, hier schematisch als Zinken einer Schwinggabel dargestellt, in den Behälter 8 hineinragt. Das Sensorgehäuse 12 der Sensoreinheit 1 verfügt hierzu über einen Prozessanschluss. In dem Sensorgehäuse 12 ist weiterhin eine Sensorelektronikeinheit angeordnet. An einer außerhalb des Behälters 8 befindlichen Stelle weist das Sensorgehäuse 12 eine Durchführung für die elektrische Leitung 5 auf. Mittels der elektrischen Leitung 5 ist die Sensoreinheit 1 mit Energie versorgbar und sind Daten an die und von der Sensoreinheit 1 übertragbar. Die Energie- und Datenübertragung an die Sensoreinheit 1 wird von dem Elektronikmodul 2 gesteuert. Dieses ist über die elektrische Leitung 5 mit der Sensoreinheit 1 verbunden, jedoch von der Sensoreinheit 1 abgesetzt angeordnet, sodass man von einer Remote-Ausführung sprechen kann. Fig. 1 shows a measuring point and a spaced therefrom control room, which is shown here schematically by a cabinet 6 behind a partition 9. At the measuring point, the sensor unit 1 is arranged such that the sensitive to be determined process variable sensor element 11, here schematically represented as tines of a tuning fork, projects into the container 8. The sensor housing 12 of the sensor unit 1 has for this purpose a process connection. In the sensor housing 12, a sensor electronics unit is further arranged. At a location located outside the container 8, the sensor housing 12 has a passage for the electrical line 5. By means of the electric line 5, the sensor unit 1 can be supplied with energy and data can be transmitted to and from the sensor unit 1. The energy and data transmission to the sensor unit 1 is controlled by the electronic module 2. This is connected via the electrical line 5 to the sensor unit 1, but arranged offset from the sensor unit 1, so that one can speak of a remote version.

Je nach Anordnung der Sensoreinheit 1 ist eine derartige separate Anordnung des Elektronikmoduls 2 zur besseren Zugänglichkeit vorteilhaft. Aus dem Stand der Technik ist die Anbringung der elektronischen Komponenten unter einer Bedachung bekannt, falls die Sensoreinheit 1 rauem Wetter oder hohen Temperaturschwankungen ausgesetzt ist. Die Einbringung des Elektronikmoduls 2 in ein separates Schutzgehäuse ist hierbei vorteilhaft oder gar erforderlich. Letzteres gilt insbesondere für explosionsgeschützte Bereiche. Die erfindungsgemäße Anordnung des Elektronikmoduls 2 im Kontrollraum stellt eine Platz und Kosten sparende Alternative zur Anordnung der Elektronik in einem an einer Wand montierten Feldgehäuse dar.Depending on the arrangement of the sensor unit 1, such a separate arrangement of the electronic module 2 for better accessibility is advantageous. From the prior art, the attachment of the electronic components under a roof is known, if the sensor unit 1 is exposed to harsh weather or high temperature fluctuations. The introduction of the electronic module 2 in a separate protective housing is advantageous or even necessary. The latter applies in particular to explosion-proof areas. The inventive arrangement of the electronic module 2 in the control room is a space and cost-saving alternative to the arrangement of the electronics in a mounted on a wall field housing.

Das Elektronikmodul 2 befindet sich in dem Kontrollraum auf einer Tragschiene 7. Üblicherweise ist in einem Kontrollraum mindestens ein Schaltschrank 6 aufgestellt, welcher mehrere Tragschienen 7 zum Anbringen von elektronischen Geräten, wie beispielsweise Steuereinheiten oder Schaltelementen aufweist. Eine derartige Anordnung ist besonders Platz sparend. Da eine Tragschiene 7 in der Regel vorhanden ist, nutzt die erfindungsgemäße Anbringung des Elektronikmoduls 2 vorhandene Infrastruktur aus. Es wird kein zusätzlicher Platz für eine Wandmontage eines Feldgehäuses mit Elektronikeinsatz benötigt.The electronic module 2 is located in the control room on a mounting rail 7. Typically, at least one control cabinet 6 is set up in a control room, which several mounting rails 7 for attaching electronic devices such For example, has control units or switching elements. Such an arrangement is particularly space-saving. Since a mounting rail 7 is usually present, the attachment of the electronic module 2 according to the invention utilizes existing infrastructure. There is no additional space required for wall mounting a field housing with electronics module.

Die Anordnung des Elektronikmoduls 2 im Schaltschrank 6 ist insbesondere beim Einsatz des Messgerätes in explosionsgefährdeten Bereichen vorteilhaft, da nur die Sensoreinheit 1 in dem gefährdeten Bereich angeordnet ist, nicht aber die Elektronikeinheit. Da das Elektronikmodul 2 innerhalb des Kontrollraums und somit auf jeden Fall außerhalb eines explosionsgefährdeten Bereichs angeordnet ist, ist ein Schutzgehäuse für das Elektronikmodul 2 nicht erforderlich.The arrangement of the electronic module 2 in the control cabinet 6 is particularly advantageous when using the meter in hazardous areas, since only the sensor unit 1 is located in the vulnerable area, but not the electronic unit. Since the electronic module 2 is disposed within the control room and thus in any case outside a hazardous area, a protective housing for the electronic module 2 is not required.

Das Elektronikmodul 2 besteht im Wesentlichen aus einer Elektronikeinheit, worunter auf einer oder mehreren Leiterplatten angeordnete elektronische Komponenten wie Mikrocontroller, A/D- und D/A-Wandler, Widerstände, Kondensatoren, etc., zu verstehen sind, und einem Elektronikgehäuse. Das Elektronikgehäuse fasst die einzelnen Komponenten der Elektronikeinheit zusammen und schützt diese vor Staub oder Feuchte. Hierbei kann die Elektronikeinheit in dem Elektronikgehäuse vergossen sein. Das Elektronikgehäuse weist eine oder mehrere Schnittstellen auf, über welche ein elektrisches Signal abgreifbar und weiterleitbar ist. Die Sensoreinheit 1 wird über das Elektronikmodul 2 mit Energie versorgt.The electronic module 2 consists essentially of an electronic unit, which is to be understood as arranged on one or more printed circuit boards electronic components such as microcontroller, A / D and D / A converters, resistors, capacitors, etc., and an electronics housing. The electronics housing combines the individual components of the electronics unit and protects them from dust or moisture. In this case, the electronics unit may be cast in the electronics housing. The electronics housing has one or more interfaces, via which an electrical signal can be tapped off and forwarded. The sensor unit 1 is supplied with power via the electronic module 2.

In Fig. 2 ist die Befestigung des Elektronikmoduls 2 an der Tragschiene 7 illustriert. Hierzu ist ein an die Art der Tragschiene 7 angepasster Adapter 3 vorgesehen. Bei der Tragschiene 7 handelt es sich beispielsweise um eine so genannte Hutschiene, welche auch als DIN-Schiene TS-35 bekannt ist. Der Adapter 3 kann aber auch an eine andere Tragschiene 7, wie z.B. eine G-Schiene, angepasst sein. Die Montage des Elektronikmoduls 2 an der Tragschiene 7 ist in einfacher Weise möglich. Beispielsweise ist das Elektronikmodul 2 mittels Schrauben an dem Adapter 3 befestigbar und der Adapter 3 auf die Schiene aufschiebbar oder einklemmbar. Auch die Demontage und ein Austausch des Elektronikmoduls 2 sind entsprechend schnell und ohne großen Aufwand durchführbar. In einer alternativen Ausgestaltung sind das Elektronikmodul 2 und der Adapter einteilig ausgestaltet, d.h. der Adapter ist Teil des Gehäuses des Elektronikmoduls 2.In Fig. 2 the attachment of the electronic module 2 to the mounting rail 7 is illustrated. For this purpose, an adapted to the nature of the support rail 7 adapter 3 is provided. The mounting rail 7 is, for example, a so-called DIN rail, which is also known as DIN rail TS-35. The adapter 3 can also be adapted to another support rail 7, such as a G-rail. The mounting of the electronic module 2 to the mounting rail 7 is possible in a simple manner. For example, the electronic module 2 by means of screws to the adapter 3 can be attached and the adapter 3 pushed onto the rail or clamped. The disassembly and replacement of the electronic module 2 are correspondingly fast and feasible without great effort. In an alternative embodiment, these are Electronics module 2 and the adapter designed in one piece, ie the adapter is part of the housing of the electronic module. 2

Der Adapter 3 weist eine Leiterplatte 31 auf, welche beispielsweise einsteckbar ausgestaltet ist. Auf der Leiterplatte 31 befinden sich Leiterbahnen, welche einerseits in Anschlusskontakte 32 münden und andererseits von dem Elektronikmodul 2 kontaktierbar sind. Über die Anschlusskontakte 32 erfolgen die Verbindung des Elektronikmoduls 2 mit einer Energiequelle und die Ausgabe eines oder mehrerer Ausgangssignale des Elektronikmoduls 2.The adapter 3 has a printed circuit board 31, which is configured, for example, inserted. On the printed circuit board 31 are printed conductors, which on the one hand lead into terminal contacts 32 and on the other hand are contacted by the electronic module 2. Via the connection contacts 32, the connection of the electronic module 2 to a power source and the output of one or more output signals of the electronic module 2 take place.

Die Elektronikeinheit des Elektronikmoduls 2 ist vorteilhaft derart ausgestaltet, dass keine zusätzliche Steuereinheit für nachgestellte Feldgeräte erforderlich ist. Hierzu weist die Elektronikeinheit neben Mitteln zur Auswertung des von der Sensoreinheit 1 übermittelten Empfangssignals Mittel zur Erzeugung mindestens eines Schaltsignals auf, welches an nachgestellte Feldgeräte weiterleitbar und von diesen verarbeitbar ist. Ein weiteres Signal kann an einen Rechner übertragen werden, welcher über ein Bussystem mit dem Elektronikmodul 2 verbunden ist und über welchen beispielsweise die Eingabe von Parametern für die Messung ermöglicht ist. Weitere Funktionen des Elektronikmoduls 2 sind beispielsweise die Erzeugung eines zur Energie- und Datenübertragung an die Sensoreinheit 1 geeigneten Signals. Die Kommunikation zwischen Sensoreinheit 1 und Elektronikmodul 2 erfolgt vorzugsweise über eine UART-Schnittstelle.The electronic unit of the electronic module 2 is advantageously designed such that no additional control unit for downstream field devices is required. For this purpose, in addition to means for evaluating the received signal transmitted by the sensor unit 1, the electronic unit has means for generating at least one switching signal which can be relayed to and processed by the field devices which have been readjusted. Another signal can be transmitted to a computer, which is connected via a bus system to the electronic module 2 and via which, for example, the input of parameters for the measurement is possible. Further functions of the electronic module 2 are, for example, the generation of a signal suitable for energy and data transmission to the sensor unit 1. The communication between sensor unit 1 and electronic module 2 preferably takes place via a UART interface.

Im Fall eines Grenzstandschalters zur Überwachung eines bestimmten Füllstands wird über die Anschlusskontakte 32 das Schaltsignal ausgeben, welches das Erreichen des zu überwachenden Füllstands signalisiert. Dieses wird beispielsweise als Steuersignal an eine Pumpe weitergeleitet.In the case of a level switch for monitoring a certain level, the switching signal is output via the connection contacts 32, which signals the reaching of the level to be monitored. This is forwarded, for example as a control signal to a pump.

In einer alternativen Ausgestaltung ist die Elektronikeinheit des Elektronikmoduls 2 derart ausgestaltet, dass sie das Empfangssignal von der Sensoreinheit 1 zwar auswertet, für die Erzeugung des passenden Schaltsignals für nachgeordnete Feldgeräte, sowie für die Kommunikation mit einem Rechner jedoch eine separate Steuereinheit verantwortlich ist. Das Elektronikmodul 2 übergibt in diesem Fall ein Ausgangssignal, vorzugsweise ein 4-20mA-Signal, an die Steuereinheit. Vorzugsweise erfolgt die Kommunikation zwischen Sensoreinheit 1 und Elektronikmodul 2 über ein Verfahren, welches eine relativ große Länge der elektrischen Leitung 5, welche die Sensoreinheit 1 mit dem Elektronikmodul 2 verbindet, erlaubt, sodass die Erfindung nicht nur bei in unmittelbarer Nähe zu einem Schaltschrank 6 befindlichen Sensoreinheiten 1 anwendbar ist.In an alternative embodiment, the electronics unit of the electronic module 2 is designed such that it evaluates the received signal from the sensor unit 1, but for the generation of the appropriate switching signal for downstream field devices, as well as for communication with a computer, a separate control unit is responsible. In this case, the electronic module 2 transmits an output signal, preferably a 4-20mA signal, to the control unit. The communication between the sensor unit 1 and the electronic module 2 preferably takes place via a method which allows a relatively long length of the electrical line 5, which connects the sensor unit 1 to the electronic module 2, so that the invention is not only located in the immediate vicinity of a control cabinet 6 Sensor units 1 is applicable.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Sensoreinheitsensor unit
1111
Sensorelementsensor element
1212
Sensorgehäusesensor housing
22
Elektronikmodulelectronic module
33
Adapteradapter
3131
Leiterplattecircuit board
3232
Anschlusskontaktconnection contact
55
Elektrische LeitungElectrical line
66
Schaltschrankswitch cabinet
77
Tragschienerail
88th
Behältercontainer

Claims (9)

  1. System for determining and/or monitoring at least one process variable of a medium in a container or a pipe, with a sensor unit (1), which has a sensor element (11) for recording the process variable, with an electronic module (2) in the form of an insert for a field housing (4), said electronic module having an electronic unit, and with an adapter which is designed in such a way that the electronic module (2) is at a distance from the sensor unit (1) and can be arranged on a carrier rail (7) without a field housing (4).
  2. System as claimed in Claim 1,
    characterized in that
    the adapter (3) is designed in such a way that it is possible to slide the adapter (3) onto the carrier rail (7) or to fix it permanently to the carrier rail (7).
  3. System as claimed in Claim 1 or 2,
    characterized in that
    the electronic module (2) can be screwed to the adapter (3).
  4. System as claimed in one of the previous claims,
    characterized in that
    the adapter (3) has a printed board (31) with at least one connecting contact (32), and that the electronic module (2) can be connected to the printed board (31) in such a way that at least one output signal of the electronic unit can be tapped at the at least one connecting contact (32).
  5. System as claimed in one of the previous claims,
    characterized in that
    the sensor unit (4) and the electronic module (2) are interconnected via at least one electrical cable (5).
  6. System as claimed in one of the previous claims,
    characterized in that
    the electronic unit is designed in such a way that it supplies the sensor unit (1) with a control signal, receives a reception signal from the sensor unit (1) that represents the process variable and evaluates the reception signal with regard to the process variable.
  7. System as claimed in one of the previous claims,
    characterized in that
    the electronic unit generates at least one switching signal which is used to control a downstream field device.
  8. System as claimed in one of the previous claims,
    characterized in that
    the sensor element (11) is a unit capable of mechanical oscillation or a capacitance and/or conductive probe.
  9. System as claimed in one of the previous claims,
    characterized in that
    the process variable is at least one of the following variables: level, density, viscosity and electrical conductivity.
EP12743932.1A 2011-08-16 2012-07-17 System for determining and/or monitoring at least one process variable Active EP2745082B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110081012 DE102011081012A1 (en) 2011-08-16 2011-08-16 System for determining and / or monitoring at least one process variable
PCT/EP2012/064024 WO2013023861A2 (en) 2011-08-16 2012-07-17 System for determining and/or monitoring at least one process variable

Publications (2)

Publication Number Publication Date
EP2745082A2 EP2745082A2 (en) 2014-06-25
EP2745082B1 true EP2745082B1 (en) 2015-09-09

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EP (1) EP2745082B1 (en)
DE (1) DE102011081012A1 (en)
WO (1) WO2013023861A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013226045A1 (en) 2013-12-16 2015-06-18 Continental Teves Ag & Co. Ohg Mechanically over-determined built-in speed sensor with elastic encapsulation
DE102014217951A1 (en) * 2014-09-09 2016-03-10 Volkswagen Aktiengesellschaft Adaptive sensor concept

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Publication number Priority date Publication date Assignee Title
DE3740290C2 (en) * 1987-11-27 1997-01-16 Licentia Gmbh Device for controlling and / or regulating processes
DE4438806C1 (en) * 1994-10-31 1996-03-21 Weidmueller Interface Modular control system with bus conductor
DE50214072D1 (en) * 2001-06-19 2010-01-21 Flowtec Ag VISCOSITY METER
CN100427890C (en) * 2002-10-08 2008-10-22 Vega格里沙贝两合公司 Input and output device with parameter copy function
DE202004011736U1 (en) * 2004-07-27 2004-11-04 Wöhner GmbH & Co. KG Elektrotechnische Systeme Fastening system for electric switch on guide rail has stop at end of rail and has transverse guide rails on longitudinally-sliding carriage
DE202005019524U1 (en) * 2005-12-14 2006-04-27 Raumcomputer Ag Networking device, for electrical sensors and actuators, has terminal strip held in housing and connected to control circuit board using detachable plug in connections, while the control board is held in separate housing
DE202006018196U1 (en) * 2006-11-29 2007-03-08 Erni-Elektro-Apparate Gmbh Mounting device for retaining electronic modules, has bus realized as multi-core flat cable that is equipped with plug connector, where part of wires of flat cable has length, and flat cable exhibits selectively predetermined flexibility
DE202007011112U1 (en) * 2007-08-09 2007-11-15 Mc Technology Gmbh Adapter plate, jack and device for connecting an electronic control with their connecting cables
DE102007058608A1 (en) * 2007-12-04 2009-06-10 Endress + Hauser Flowtec Ag Electric device
EP2099273A1 (en) * 2008-03-03 2009-09-09 Schroff GmbH Electronic assembly for transport in an assembly carrier
DE102009043455A1 (en) * 2009-09-29 2011-04-07 Siemens Aktiengesellschaft Arrangement for installing building system technology devices
DE202010006065U1 (en) * 2010-04-23 2010-08-05 VIPA Gesellschaft für Visualisierung und Prozeßautomatisierung m.b.H. Sequentially buildable, modular bus for an automation or control system
DE102010016865A1 (en) * 2010-05-10 2011-11-10 Weidmüller Interface GmbH & Co. KG Rail bus system
DE102010044201A1 (en) * 2010-11-21 2012-05-24 Rudi Berthel Module housing for use in module system for receiving printed circuit board carrying programmable logic controllers, utilized in e.g. laboratory, has plug connector cooperating with another connector for data communication

Also Published As

Publication number Publication date
WO2013023861A2 (en) 2013-02-21
DE102011081012A1 (en) 2013-03-07
WO2013023861A3 (en) 2013-05-10
EP2745082A2 (en) 2014-06-25

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